CVE-2026-87911Read-only enforcement bypass enabling operating system command execution in the SQL validation component of Amazon awslabs postgres-mcp-server
Updated under an hour ago ()
Does this affect you?
It affects AWS Labs postgres MCP Server. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
An OS command injection weakness in the read-only enforcement of the SQL validation component in Amazon awslabs postgres-mcp-server before 1.1.7 might allow an unauthenticated actor to execute operating system commands on the host of a self-managed PostgreSQL server by placing a crafted COPY ... TO PROGRAM statement into content that is processed when an authenticated user interacts with the MCP server in its default read-only mode. To remediate this issue, users should upgrade to version 1.1.7 or later.
- CVSS
- 9.6 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-78, CWE-184
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- AMZN
- NVD analysis
- Deferred
- Record last updated
- Sep 10, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
AWS AWS Labs postgres MCP Server aws:labs_postgres_mcp_server (from the name) | before 1.1.7 | CNA record |
References
- https://pypi.org/project/awslabs.postgres-mcp-server/1.1.7/patch
- https://aws.amazon.com/security/security-bulletins/2026-104-aws/vendor-advisory
- https://github.com/awslabs/mcp/security/advisories/GHSA-fph8-pg5w-78fvthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.